When you add news  listings, you have the option of targeting them to specific audiences. Assigning audiences to a news listing controls how the news listing appears in some parts of the portal  site. By default, audience-targeted news listings appear on a user's personal site. Keep in mind that you can't hide news items, even if they are targeted to a specific audience. They still have the capability of viewing the news item where it was created, but you can control where they appear. Individual web parts can also be targeted to appear only to members of specific audiences.